Brain Sap is another ability by Bane that helps him in his supporting role. It slowly takes away the damage of enemies and then heals Bane, similar to "absorb" in Pokemon.

Since Bane is ranged, you'll want to use him to just constantly be messing with the enemy heroes. Lower their attacks with Enfeeble and use Brain Sap to keep Bane healed as creeps are sure to come after you.

This ability will put enemies to sleep and will deal consistent damage to them.

You can hit your allies with Nightmare to cause them to go to sleep. This is advantageous because if an enemy attacks an afflicted ally (or yourself), then the "Nightmare" affliction will pass to them.

Unless you are playing with people that you know on your team, then try to avoid using Nightmare on other players. This needs to be a very coordinated thing, because your allies typically don't want to be put to sleep.

Nightmare can be used on Bane himself as well. In this case, you can wake Bane up at any time by re-selecting the ability.

Bane's Ultimate. This move is ridiculous when you land it. It will cause an enemy unit to stop moving completely, it will constantly hurt them, and it will also sap mana away from the enemy. It basically renders them completely useless and vulnerable to be absolutely destroyed.

The major downside is that it has a 100 cooldown rate, meaning that you can't spam it. You have to be precise with this move. You can put an enemy to sleep with Nightmare, and then lay this on them so they have no chance of dodging it.